高烈度地震区隧道洞口段刚柔相济抗减震模型试验研究

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Abstract In order to study shock absorber technology with rigid-flexible combination for tunnel opening section in high intensity seismic areas, taking the entrance section of Bai-yunding tunnel as a background, large-scale shaking table model tests were conducted to study peak acceleration of ground motion, longitudinal strain, contact stress and structural internal forces through analysing test data. The test results showed that only taking structural strengthening measures, the growth percentage of structure safety factor minimum value of the whole tunnel opening section is between 30%—65%; only setting a shock absorption gap, that is between 40%—55%; the shock absorption gap has an obvious action to reduce forced displacements, and its shock absorption effect is obvious; taking the shock absorber technology with rigid-flexible combination, the growth percentage of structure safety factor minimum value of the whole tunnel opening section is between 85%—145% and its action is remarkable to resist earthquake motion and reduce forced displacements, the shock absorption effect is the best. The study results provided a reference for improving the aseismic performance of transportation tunnels in high intensity seismic areas.

Key words： tunnel engineering highly seismic area tunnel portal part rigid-flexible composite anti-seismic and damping；model test

Received: 09 November 2017 Published: 28 February 2019

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	Articles by authors
	CUI Guangyao1
	JI Lei1
	WANG Mingnian2
	3
	ZHU Chang’an4

Cite this article:

CUI Guangyao1,JI Lei1,WANG Mingnian2, et al. Shock absorber with rigid-flexible combination model tests for tunnel opening section in high intensity seismic areas[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(5): 92-97.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I5/92

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